Hi Guys, I am applying the attached patch to add support for simulating the hardware multiply feature found on some MSP430 MCUs. Cheers Nick sim/msp430/ChangeLog 2014-05-08 Nick Clifton * msp430-sim.c (sim_open): Do not allocate memory over the hardware multiply registers. (get_op): Add support for reads from the hardware multiply registers. (put_op): Add support for writes to the hardware multiply registers. (msp430_step_once): Add support for the RETI instruction used by the CPUX architecture.